.sidebar {
  width: 200px;
  background-color: #f5f5f5;
  height: 100vh;
  border-right: 1px solid #ddd;
}

.sidebar ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar li {
  padding: 15px 20px;
  border-bottom: 1px solid #ddd;
}

.sidebar li.active {
  background-color: #409eff;
  color: white;
}

.sidebar a {
  text-decoration: none;
  color: inherit;
  display: block;
}